Methods and apparatus for washing gas turbine engines

(19)

(11)

EP 1 225 307 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	21.01.2004 Bulletin 2004/04

(43)	Date of publication A2:
	24.07.2002 Bulletin 2002/30

(21)	Application number: 02250356.9

(22)	Date of filing: 18.01.2002

(51)	International Patent Classification (IPC)⁷: F01D 25/00, C11D 11/00

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

(30)

Priority:

19.01.2001 US 766090

(71)	Applicant: GENERAL ELECTRIC COMPANY
	Schenectady, NY 12345 (US)

(72)	Inventors:
	Ackermann, John Frederick Laramie, Wyoming 82070 (US) Johnson, Robert Alan Simpsonville, South Carolina 29680 (US) Stowell, William Randolph Rising Sun, Indiana 47040 (US)

(74)	Representative: Goode, Ian Roy et al
	London Patent Operation General Electric International, Inc. 15 John Adam Street London WC2N 6LU London WC2N 6LU (GB)

(54)	Methods and apparatus for washing gas turbine engines

(57) A gas turbine engine wash process (40) that facilitates reducing a formation of particulate matter within a gas turbine engine (10) is described. The engine wash process includes injecting (60) a first liquid into the engine to remove particulate matter formed within the engine and adversely affecting engine operation and performance. A second liquid is then injected (80) into the engine to facilitate reducing a rate of formation of particulate matter within the gas turbine engine as the engine is operated in the future. More specifically, the second liquid is an anti-static liquid that coats compressor blades within the gas turbine engine.

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